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EASA AIRWORTHINESS DIRECTIVE 

AD No : 2007- 0099 

Date: 11 April 2007

No person may operate an aircraft to which an Airworthiness Directive applies, except in accordance with the 

requirements of that Airworthiness Directive unless otherwise agreed with the Authority of the State of Registry.

Type Approval Holder’s Name : 

EUROCOPTER 

Type/Model designation(s) : 

AS 332, SA 365 N, AS 365 N, SA 366, EC 

155,AS 355, EC 130 and AS 350 

helicopters. 

TCDS Number: EASA.R.002, DGAC FRANCE 159, EASA.R.146 and EASA.R.008. 

Foreign AD: Not applicable 

Supersedure: Not applicable 

ATA 67 Rotors Flight Control – Main & Tail Rotors Servo-Controls – 

Inspection / Modification 

Manufacturer(s): EUROCOPTER (Formerly EUROCOPTER - FRANCE,AEROSPATIALE) 

Applicability: - AS 332 C, C1, L, L1 and L2, 

- SA 365 N and N1, AS 365 N2 and N3, SA 366 G1, EC 155 B and B1, 

- AS 355 F, F1, F2 and N, and 

- EC 130 B4, AS 350 B3,

EUROCOPTER helicopters, all serial numbers (s/n) that are equipped with 

main and tail rotor GOODRICH servo-controls without the letter “R” 

marked in the inspection box of the servo-control identification plate, and 

whose part numbers (p/n) and s/n are listed in paragraph 1.A. of the 

relevant EUROCOPTER Alert Service Bulletin (ASB) in table 1 below. 

For Refer to 

AS 332 AS 332 ASB No. 67.00.37 

AS 365 & SA 365 AS 365 ASB No. 67.00.13 

SA 366 SA 366 ASB No. 67.08 
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For Refer to 

EC 155 EC 155 ASB No. 67A010 

AS 355 AS 355 ASB No. 67.00.28 

EC 130 EC 130 ASB No. 67A010 

AS 350 AS 350 ASB No. 67.00.40 

Table 1 

Reason: This Airworthiness Directive (AD) is issued following a manufacturing nonconformity found on one batch of servo-control cap p/n. 800137. 

With a defective servo-control, rotation of the distributor might not be 

stopped mechanically since only friction of inner seals holds the distributor 

sleeve in its position. 

If not corrected this condition could cause untimely movements of servocontrols, which are used on main and anti-torque rotors, and lead to the 

loss of control of the helicopter. 

The aim of this AD is to identify the defective servo-controls either in 

service or on shelf and to return them to the supplier so as to be modified 

and returned to conformity. 

Effective Date: 25 April 2007 

Compliance: 1. Within 2 months from the effective date of the present AD, check for 

identification the servo controls installed on helicopters and on the 

shelves, with reference to the paragraph (§) 1.A of the applicable 

Eurocopter ASB given in table 1. 

2. At the latest on the next removal of the servo-controls not to exceed 2 

years from the effective date of this AD, return the identified defective 

servo-controls per the § 1. of this AD, as instructed in the 

accomplishment instructions of the applicable Eurocopter ASB given in 

table 1. 

3. As of 25 April 2009, no person shall install servo controls whose p/n and 

s/n are listed in the applicable Eurocopter ASB given in table 1. on any 

Eurocopter helicopters unless they have been previously returned to 

conformity to be compliant with the relevant Eurocopter ASB given in 

table 1 

Ref. Publications: EUROCOPTER 

AS 332 Alert Service Bulletin No. 67.00.37. 

AS 365 ASB No. 67.00.13. 

SA 366 ASB No. 67.08. 

EC 155 ASB No. 67A010. 

AS 355 ASB No. 67.00.28. 

EC 130 ASB No. 67A010. 

AS 350 ASB No. 67.00.40. 

or later approved revisions.. 
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Remarks : 1. If requested and appropriately substantiated the responsible EASA 

manager for the related product has the authority to accept Alternative 

Methods of Compliance (AMOCs) for this AD. 

2. This AD was posted as PAD 07-035 for consultation on 07 March 2007 

with a comment period until 04 April 2007. No comments were received 

during the consultation period. 

 3. Enquiries regarding this Airworthiness Directive should be referred to 

the AD Focal Point - Certification Directorate, EASA. 

E-mail: ADs@easa.europa.eu .

4. For any question concerning the technical content of the requirements in 

this AD, please contact: EUROCOPTER 

Aéroport de Marseille Provence 13725 Marignane Cedex - France. 

Tel: 33 (0) 4 42 85 97 97, Fax: 33 (0) 4 42 85 99 66. 

E-mail: Directive.technical-support@eurocopter.com